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Server functionality for HBase

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.hadoop.hbase.master.balancer;

import org.apache.hadoop.hbase.RegionMetrics;
import org.apache.hadoop.hbase.Size;
import org.apache.yetus.audience.InterfaceAudience;
import org.apache.yetus.audience.InterfaceStability;

/**
 * Wrapper class for the few fields required by the {@link StochasticLoadBalancer} from the full
 * {@link RegionMetrics}.
 */
@InterfaceAudience.Private
@InterfaceStability.Evolving
class BalancerRegionLoad {
  private final long readRequestsCount;
  private final long writeRequestsCount;
  private final int memStoreSizeMB;
  private final int storefileSizeMB;

  BalancerRegionLoad(RegionMetrics regionMetrics) {
    readRequestsCount = regionMetrics.getReadRequestCount();
    writeRequestsCount = regionMetrics.getWriteRequestCount();
    memStoreSizeMB = (int) regionMetrics.getMemStoreSize().get(Size.Unit.MEGABYTE);
    storefileSizeMB = (int) regionMetrics.getStoreFileSize().get(Size.Unit.MEGABYTE);
  }

  public long getReadRequestsCount() {
    return readRequestsCount;
  }

  public long getWriteRequestsCount() {
    return writeRequestsCount;
  }

  public int getMemStoreSizeMB() {
    return memStoreSizeMB;
  }

  public int getStorefileSizeMB() {
    return storefileSizeMB;
  }
}